A sale of Pactera could attract interest from both private-equity firms and technology companies, according to the people. Valuation could be one of the main hurdles to a deal, as there is a gap between what HNA paid for Pactera and what potential buyers may be willing to offer, the people said. HNA’s ownership of Pactera dates back to 2016, when it agreed to buy the company from Blackstone Group LP for about $700 million.